Do not recalculate constant part of is_complex for every MB.

Originally committed as revision 16172 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/h264.c

@@ -2610,9 +2610,7 @@ static void hl_decode_mb(H264Context *h){
     MpegEncContext * const s = &h->s;
     const int mb_xy= h->mb_xy;
     const int mb_type= s->current_picture.mb_type[mb_xy];
-    int is_complex = FRAME_MBAFF || MB_FIELD || IS_INTRA_PCM(mb_type) || s->codec_id != CODEC_ID_H264 ||
+    int is_complex = h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
-                    (ENABLE_GRAY && (s->flags&CODEC_FLAG_GRAY)) || (ENABLE_H264_ENCODER && s->encoding) || ENABLE_SMALL ||
-                    s->qscale == 0;
 
     if(ENABLE_H264_ENCODER && !s->decode)
         return;
@@ -6573,6 +6571,9 @@ static int decode_slice(struct AVCodecContext *avctx, void *arg){
 
     s->mb_skip_run= -1;
 
+    h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
+                    (ENABLE_GRAY && (s->flags&CODEC_FLAG_GRAY)) || (ENABLE_H264_ENCODER && s->encoding) || ENABLE_SMALL;
+
     if( h->pps.cabac ) {
         int i;
 

libavcodec/h264.h

@@ -491,6 +491,8 @@ typedef struct H264Context{
      * pic_struct in picture timing SEI message
      */
     SEI_PicStructType sei_pic_struct;
+
+    int is_complex;
 }H264Context;
 
 #endif /* AVCODEC_H264_H */